iphone uiscrollview 和 uiimageview - 设置初始缩放

发布于 2024-08-29 17:17:11 字数 580 浏览 5 评论 0原文

我使用以下代码将图像加载到滚动视图中。图像始终以 100% 缩放比例加载。有没有办法将其设置为加载到另一个缩放级别，例如 0.37？

我尝试过scrollView.zoomScale = .37但它似乎不起作用

UIImageView *tempImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:data]];
        self.imageView = tempImage;

        scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height);
        scrollView.maximumZoomScale = 1;
        scrollView.minimumZoomScale = .37;
        scrollView.clipsToBounds = YES;
        scrollView.delegate = self;

        [scrollView addSubview:imageView];

原文

I use the following code to load an image into an scroll view. The image always loads at 100% zoom. Is there a way to set it to load to another zoom level, say .37?

I have tried scrollView.zoomScale = .37 but it didnt seem to work

UIImageView *tempImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:data]];
        self.imageView = tempImage;

        scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height);
        scrollView.maximumZoomScale = 1;
        scrollView.minimumZoomScale = .37;
        scrollView.clipsToBounds = YES;
        scrollView.delegate = self;

        [scrollView addSubview:imageView];

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—━☆沉默づ 2024-09-05 17:17:11

仅当您实现 viewForZoomingInScrollView: 委托回调时，缩放才有效。

-(UIView *) viewForZoomingInScrollView:(UIScrollView *)inScroll {
  return imageView;
}

Zooming only works when you implement the viewForZoomingInScrollView: delegate callback.

-(UIView *) viewForZoomingInScrollView:(UIScrollView *)inScroll {
  return imageView;
}

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寒尘 2024-09-05 17:17:11

我想通了...我正在使用scrollView.zoomScale = 0.37;在加载图像之前更改了代码并且效果很好。

UIImageView *tempImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:data]];
self.imageView = tempImage;

scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height);
scrollView.maximumZoomScale = 1;
scrollView.minimumZoomScale = .37;
scrollView.clipsToBounds = YES;
scrollView.delegate = self;
[scrollView addSubview:imageView];
scrollView.zoomScale = .37;

I figured it out... I was using scrollView.zoomScale = 0.37; before I loaded the image changed code and it works great.

UIImageView *tempImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:data]];
self.imageView = tempImage;

scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height);
scrollView.maximumZoomScale = 1;
scrollView.minimumZoomScale = .37;
scrollView.clipsToBounds = YES;
scrollView.delegate = self;
[scrollView addSubview:imageView];
scrollView.zoomScale = .37;

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